Jeremy, here's the lower i/c hose we have on my friends van. It's a 2.0" to 2.5" 90 degree reducer/expander, and a 2.5" to 3.0" 90 degree reducer/expander to fit on the 600hp kit from Frozenboost.com.
We actually had to shorten the bends where they meet at the 2.5" side to get them to fit but I think the frozenboost/siliconeintake hoses are really nice with smooth bends.
The upper hose is a 3.0 to 2.5 or 2.25" reducer and that's it, pretty much bolted right onto the TB of the 2 piece intake.
We welded one of my aluminum talon BOV flanges to the end tank of the i/c.
Here's a 1st round of intstall
It functioned like this, but we've since moved the pump to the low point of the system and gotten rid of the remote cap setup and added a volvo overflow tank as a fill/reservoir like AJ has pictured. We drilled a hole in the top corner of the water end tank on the i/c and plumb that to the top nipple on the reservoir to bleed air out of the i/c water core area, I'm not sure where AJ has his feeding from but we felt this was the most beneficial place as you don't want air in the i/c water part. We should really get some new pics of the new setup up instead of showing all these old versions.
I'm putting one in my SL but the lower hose will be different as I am using a GT30R and a TBI header setup.